下组图中，哪个图形使用了修边（剪）命令（） A.A B.B C.C D.D

阅读理解。

     Tom  and   Mike were good friends.   Sometimes   they were kind to each

other, sometimes they were not. But some of their classmates said they were

like brothers. One day they went out for a walk together.  At noon they were

very hungry  and they went into a restaurant to have lunch.  The waiter came

up to them and asked, "What can I do for you?" "Please bring us two apples

first." said Tom. When the waiter put the two apples on the table, Mike took

the bigger one at once. Tom got angry.  "You are impolite(没 礼 貌). Why

didn't you take the smaller one? " Tom  said.  "But  I  was right," said Mike

with a smile. "If    I let you take first,  which  one will you choose? "   "Of

course I'll take the smaller one."  said Tom. "Yes," Mike said, "If you take

the smaller one, the bigger one will be mine.   Don't you think so?"   "Oh."

Tom couldn't answer.

根据短文内容, 判断下列各句正(T)误(F)。

(    )1. Tom and Mike were not kind to each other.              

(    )2. They went out to sit in a restaurant.                  

(    )3. The waiter brought them two apples before the meal.    

(    )4. Mike took the bigger apple.                            

(    )5. At last Tom had the bigger apple.                      

若a=b﹣3，则b﹣a的值是 [ ]

A．3

B．﹣3

C．0

D．6

石化企业的环境风险主要是由于企业在生产、贮存、运输、"三废"处理过程中存在着化学品、危险化学品、剧毒品、油气的泄漏和有害物料的大量跑损、事故状态下有害气体的扩散及含有污染物的消防水的大量排放、污染防治设施故障等意外因素，会导致或可能导致对周边水源、水体、大气、土壤的污染以及生态破坏、人员伤亡、财产损失，形成不良社会影响。（）

如果该企业计划要求降低应收账款余额，则可采用的措施有( )。

A．降低信用标准

B．降低现金折扣率

C．延长信用期限

D．加快应收账款回收